NX What is the difference between STEP 1 HOLE and SLOT_ROUND in Feature recognition.

When two different parts have same diameter holes, one hole is recognized as STEP HOLE and another hole is recognized as SLOT_ROUND. why?

Solution

If the cylinder covers more than half circle, then it lists as Step Hole (> 180 degrees).
 
If the cylinder covers less than half circle it lists as Slot Round ( <=  180  and  > 90 degrees).

Hardware/Software Configuration

Platform: all
OS: n/a
OS Version: n/a
Product: NX
Application: CAM
Version: V12.0.2
Function: FEATURE_BASED

Ref: 002-8015416